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package com.vng.zing.survey.data;

import static com.vng.zing.survey.data.Base.deserialize;
import static com.vng.zing.survey.data.Base.serialize;
import com.vng.zing.survey.thrift.model.Action;
import com.vng.zing.survey.thrift.model.IDSurveyItem;
import com.vng.zing.survey.thrift.model.Error;
import java.io.IOException;
import java.util.ArrayList;
import java.util.concurrent.locks.Lock;
import java.util.concurrent.locks.ReentrantLock;
import java.util.logging.Level;
import kyotocabinet.DB;
import org.apache.log4j.Logger;
/**
 *
 * @author kienpd
 */
public class IDSurveyNewData extends Base {

    private static final Logger logger_ = Logger.getLogger(IDSurveyData.class);
    private static final Lock createLock_ = new ReentrantLock();
    private static IDSurveyNewData _instance = null;
    private final DB db;

    public IDSurveyNewData() {
        db = new DB();
        if (!db.open("database/idsurveynew.kch"+cofigid, DB.OWRITER | DB.OCREATE |DB.OAUTOTRAN)) {
            System.err.println("open error: " + db.error());
        }

    }

    public static IDSurveyNewData getInstance() {
        if (_instance == null) {
            createLock_.lock();
            try {
                if (_instance == null) {
                    _instance = new IDSurveyNewData();
                }
            } finally {
                createLock_.unlock();
            }
        }
        return _instance;
    }

    public IDSurveyItem getIDSurveyItem(int idUser) {
        try {
            byte[] key = serialize(idUser);
            byte[] value = db.get(key);
            if (value == null) {
                return null;
            }
            IDSurveyItem dSurveyItem = new IDSurveyItem();
            dSurveyItem = (IDSurveyItem) deserialize(value);
            return dSurveyItem;
        } catch (IOException ex) {
            logger_.error("IDSurveyData.getIDSurveyItem:" + ex.getMessage(), ex);
        } catch (ClassNotFoundException ex) {
            java.util.logging.Logger.getLogger(IDSurveyData.class.getName()).log(Level.SEVERE, null, ex);
        }
        return null;

    }

    public Error setIDSurveyItem(int idUser, IDSurveyItem iDSurveyItem) {

        try {
            byte[] key = serialize(idUser);
            byte[] value = serialize(iDSurveyItem);
            if (!db.set(key, value)) {
                return Error.ERR_SYSTEM;
            }
            return Error.SUCCESS;
        } catch (IOException ex) {
            logger_.error("IDSurveyData.setIDSurveyItem:" + ex.getMessage(), ex);
        }
        return Error.ERR_SYSTEM;
    }

    public Error updateIDSurveyItem(int idUser, int idSurvey, Action action) {
        db.begin_transaction(false);
        try {
            IDSurveyItem dSurveyItem = new IDSurveyItem(new ArrayList<Integer>(200), 0);
            byte[] key = serialize(idUser);
            byte[] value = db.get(key);
            if (value != null) {
                try {
                    dSurveyItem = (IDSurveyItem) deserialize(value);
                } catch (ClassNotFoundException ex) {
                    java.util.logging.Logger.getLogger(IDSurveyData.class.getName()).log(Level.SEVERE, null, ex);
                }
            }
            if (action == Action.ADD) {
                dSurveyItem.getIdSurveys().add(0, idSurvey);
                dSurveyItem.setCount(dSurveyItem.getCount() + 1);
            } else if (action == Action.REMOVE) {
                if ((dSurveyItem.getIdSurveys().remove((Integer) idSurvey)) == false) {
                    db.end_transaction(true);
                    return Error.IDSURVEY_NO_EXITS;
                }
                if (dSurveyItem.getCount() > 0) {
                    dSurveyItem.setCount(dSurveyItem.getCount() - 1);
                }
            }
            value = serialize(dSurveyItem);
            if (!db.set(key, value)) {
                db.end_transaction(true);
                return Error.ERR_SYSTEM;
            }
            db.end_transaction(true);
            return Error.SUCCESS;

        } catch (IOException ex) {
            logger_.error("IDSurveyData.getIDSurveyItem:" + ex.getMessage(), ex);
        }
        db.end_transaction(true);
        return Error.ERR_SYSTEM;
    }
}
